Oil burner



May 22, 1928.

C. W. SIEVERT OIL BURNER Filed July 19, 1927 rift z Patented May 22d, 1928i.

UNITED `STATES PATENT OFFICE...

CHARLES W. SIEVERT, OF LOS ANGELES, CALIFORNIA.

OIL BURNER.A

Application sled July 1a,

mainly by improvements in the general type liquid fuel burner shown in Patents Nos. 738,635 and 710,899. issued to me on Sept. 8, 1903, and October'?. 1902, respectively and also in my application Serial Number 52,481, filed August 31, 1925.

A general object of the present invention is to provide a burner of that type and character which is simple in form, efficient in operation and economical and easy of manufacture, and which offers as little ob struction as possible to the interior of the furnace and to the play of the fiame above the burner. p y y The accomplishment of these and other `objects and the advantages and novel features of the invention will be best understood from the following detailed description, reference for this purpose being` had to the accompanying drawings, in which:

Fig. 1 is a plan' of my improved burner; Fig; 2 is` asection on line 2%2 of Fig. 1 and showing a burner installed in a typical furnace; y

Fig. 3 is a similar section on line 3- of Fig. 1.; y

Fig/1 is a secti n on line 4-4 of 1; Fig. 5 is a section like that of Fig, 2` but showing a modified form of burner; and

Fig. 6 is a section on line (3*6 of Fig. 5. The burner includes` characteristically a bowl 10 into the lower part of which there leads a liquid fuel feed `pipe 11 through fwhich liquid` fuel is` fed to the burner in proportion to its requirements. Preferably this fuel feed pipe extends up through the bottom of the bowl 'and projectssomewhat above the inner bottom surface of the bowl. Bowl 10 is mounted and supported upon a plate 12 which is substantially rectangular in plan and is made of such size as to more for less completely fill the horizontal cross `section of the furnace `chamber which is enclosed by the furnace walls 13. Bowl 10 may be substantially circular in plan but..

in korder to adapt a single standardized burner to furnaces of different sizes and shapes the `bowl mayphave two opposite flat side walls 14 which parallel the longer side edges of mounting plate 12. The mounting combustion chamber above the burner.

1927. Serial No. 206,807.

plate mayV have sidev extensions 12" in segY ment form which may be breakable from tliemain body of the plate along breaking lines 15; so that if the parts 12 are broken awaythe plate 12 is left in rectangular form. Other breaking lines mai1 be provided in order to'break. the platev 12 downto any desired configuration to fit any shape of furnace. For instance circular breaking lines 15 may be provided so that the plate may be broken down to circular formation l in plan to tit a circular furnace chamber.

Usually the mounting platev will be mounted in the furnace chamber by resting upon a flange or flanges such as illustrated at 20; but the mounting and support of the plate may be accomplished in any suitable manner. In any Case it `is desirable'that the plate 12 substantially completely close olf the furnace chamber so that all air which passes into the combustion` chamber above the burner must pass through the burner in themannernow to be described.

The air pipe P extends across the upper part of the bowlp` In its preferred form this air pipe is substantially semi-circular in cross-section, open at both ends 'at 30 and has a flattop wall 31. The air pipe rests in two semi-circularopenings or notches 32 in the bowl wall, and in the form shown in Fig. 1, with the air pipe so in place, the upper fiat wall 31 lies just above `plate 12 and its projecting end portions 33 overhang 'plate 12` and rest upon that plate, as is best shown in Figs. 1 and 2. The air pipe is thus prevented kfrom turning in its seat, and needs no fastening means to hold it in place The air pipe has a central lower air openinr'q` 34 through which the air that enters the two oppositegends of the pipe flows downwardly over the' center of the bowl and over `the fuel pipe 11. The air being thus feddown onto the surface of the fuel, picks up the gases and vapors and the burning mixture moves outwardly and upwardly around the air pipo, combustion taking place around the air pipe and in rlte e combustion space above the burner is free and unobstructed, the air pipo not extending into or occupying any portion of that space. At the same time the air pipe is located comparativelylow in the bowl. It becomes heated b v the combustion and in turn radiates heat to the liquid fuel which vis fed into the bowl, and also functions as a esV reservoir of heat which will act to keep fuel in the bowl hot during any temporary eutting ofi" of eombustion. lf the burner should be temporarily turned out, the bowl 5 and the air pipe hold a sullicient quantity of heat to warm the Fuel whieh ma)` be subst-quentl)v admitted to the bowl when it is desired to start combustion again; and the position of the air pipe close down to the fue] eti'eetirely aids in this function.

It desired. the air pipe may be equipped with auxiliar)v air holes S5 for allowing the feed ot a eertuin amount of air out into the combustive mixture around the main air outlet 34.

Figs. 5 and G show av slightly modified form of air pipe arrangement. Here the air pipe P1 is made to lie flush with the plate 12. The bowl is constructed the same as before exeept that, in the hott-om ot the semieireular air opening 3Q the bowl wa'll has small lugs ll() which enter notehes 41 on the `)under side ot' the air pipe to keep the air pipe from turning away from its proper position. And in this form the upper flat wall 31 ot the air pipe may be entirely flush with plate 1Q. as shown in Figs. 5 and 6.

l elaim l. A liquid fuel burner ot the character described. eomprising a liquid fuel bowl with an open upper end and having at its upper edge a flange formation forming a burner plate. the wall of the bowl-` having air pipe openings extending below the burn- 35 er plate. and an air pipe extending across the bowl and having open ends resting in the air pipe openings and having a. central downwardly facing air outlet adapted to deliver air downwardly into the center of the bowl.

Q. A'Y liquid fuel burner oi the eliaraeter described. eomprising a liquid tuel bowl with an open upper' end and having' at. its upper edge a flange formation forming a burner plate. the Vall of the howl having air pipe openings extending below the burner plate. and an air pipe extending across the bowl and having open ends resting in the air pipe openings and having a eentral downwardly 5U facing air outlet adapted to deliver air downwardly into the center of the howl. the upper wall ot the airpipe beingflat and being substantially flush with the burner plate. t-l. A: liquid fuel burner ot the ehararterde- 5 seribed. eominising a liquid fuel bowl with an open upper end and having at its upper edge a fiange torination 'forming a. burner plate. the wall oi the bowl having air pipe openings extendiner below the burner plate. and an air pipe extending aeross the bowl and having open ends resting in the air pipe openings and having a central downwardly facing air outlet adapted to deliver air downwardly into the Center of the bowl, u the air pipe being substantially semi-oircular in cross-section and having a. flat upper wall substantially flush with the burner plate, and means to prevent rotational displacementl of the air pipe with rolation to the bowl and plate.

1. A liquid fuel burner of the eliaraeter described` Comprising a. liquid fuel bowl with an open upper end and haring at its upper edge a flange formation forming a burner plate'.V the wall of the howl having.r air pipe inpenings extending below the burner plate. and an air pipe extending across the bowl and having open ends resting in the air pipe openings and having a central downwardly facing air outlet adapted to (leliver air dmvnwardly into the center ot the bowl.. the air pipe being substantially7 semi circular in cross-section and having a tlat upper wall substantially flush with the burner plate, and means to prevent rotatiomll displacement ofthe air pipe with relation to the bowl and plate, said last mentioned means embodying extensions of the upper air pipe wall which rests upon the burner pla-ie.

A liquid fuel burner ot the rharaeter deseribed` eomprising a. liquid i'uel bowl with an open upper end and having at its upper edge aI flange formation forming a burner plate'. the wall of the bowl having air pipe` openings extending below the burner plate. and an air pipe extending across the bowl and having open ends restingr in the air pipe openings and having a central downwardly facing. air outlet adapted to deliver, air downwardly into the center of the bowl, the. air pipe beingsubstantially semi-circular in cross-section and having a flat upper wall substantially flush with the burner plate, and means to prevent. rotational displacement of the air pipe with relation tothe bowl and plate, said last mentioned means embodying intertitting formations between the air pipe and the bowl. i

6. A liquid fuel burner of the eharacter described` comprising a. liquid fuel bowl with an open upper end and having at its upper edge a flange formation forming aburner plate. the wall ofy the bowl having air pipe openings extending below the burner plate. and an air pipe extending across the bowl aand having open ends resting in the air pipe openings and havingv a central downwardly facing air outlet adapted to deliver air downwardlyr into the center of the bowl. the air pipe being substantially semieircular in Cross-section and having a flat upper wall substantially flush with the burner plate, and means to prevent rotational displacement of the air pipe with relation tothe bowl and plate. said last mentioned means embodying interitting lugs and notches on the air pipe and bowl.

7. A liquid fuel burner of the character described, comprising a liquid fuel bowl open 'pipe opening through it located below the urner plate, and a'horizontally extending air pipe having an open end resting 1n the air pipe opening and having an air outlet `discharging downwardly into the center' part of the bowl, the air pipe lying substantially wholly within the bowl and below the plane of the burner plate.

8. A liquid fuel burner of the character described, comprising a liquid fuel bowl open at its upper end and having a flange orination around its upper edge forming a burner plate, the wall of the bowl having two opposite air pipe openings and an air pipe open at its opposite ends and resting at its two ends in these two openings and having a central downwardly discharging aii` outlet, the air pipe lying substantially wholly within the bowl and below the plane of the burner plate.

described, comprising a liquid fuel bowl with an op'en upper end and having at its upper edge a flange formation forming a burner plate, the wall of the bowl `having air pipeopenings extending below the burner plate,` and an air pipe extending across the bowl and having open ends resting in the air pipe openings and having a central downwardly facing airoutlet adapted to deliver air downwardly into the center of the bowl, the air pipe having auxiliary air openings through its wall arranged around said air outlet and adapted to deliver air from the air pipe into the conbustive mixture arising from the bottom of the bowl.

l0. A liquid fuel burner oit the character described, comprising a liquid fuel bowl open at its upper end and having a flange formation around its upper edge forming aP burner plate, the wall of the bowl having an air pipe' opening through it located below the burner plate, and a horizontally extending air pipe having an open end resting in the air pipe opening and having air outlet discharging downwardly into the center part of the bowl, the air pipe lying substantially wholly within `the bowl and below the plane of the burner plate, the air pipe having auxiliary air openings through its wall arranged c around said air outlet and adapted to de- 9. A liquid fuel burner of the character liver air from the air pipe into the combustive mixture arising from the bottom of the bowl.

In witness that I claim the foregoing I have hereunto subscribed my name this 23d day of June, 1927.

CHARLES W. SIEVERT. 

